131890697 has 2 divisors, whose sum is σ = 131890698. Its totient is φ = 131890696.

The previous prime is 131890667. The next prime is 131890699. The reversal of 131890697 is 796098131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107723641 + 24167056 = 10379^2 + 4916^2 .

It is an emirp because it is prime and its reverse (796098131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131890697 - 2²⁰ = 130842121 is a prime.

Together with 131890699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131890699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65945348 + 65945349.

It is an arithmetic number, because the mean of its divisors is an integer number (65945349).

Almost surely, 2^131890697 is an apocalyptic number.

It is an amenable number.

131890697 is a deficient number, since it is larger than the sum of its proper divisors (1).

131890697 is an equidigital number, since it uses as much as digits as its factorization.

131890697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 131890697 is about 11484.3675054397. The cubic root of 131890697 is about 509.0237597996.

The spelling of 131890697 in words is "one hundred thirty-one million, eight hundred ninety thousand, six hundred ninety-seven".